Submission #1270563

#	Time	Username	Problem	Language	Result	Execution time	Memory
1270563		kaiboy	Highway design (CEOI12_highway)	C++20	100 / 100	1 ms	584 KiB

highway

#include <algorithm>
#include <iostream>
#include "office.h"

using namespace std;

int main() {
	int n = GetN();
	if (isOnLine(1, 2, 3)) {
		int i = 4;
		while (isOnLine(1, i, i + 1))
			i += 2;
		int j = i + 2;
		while (j <= n && (j < n ? isOnLine(1, j, j + 1) : isOnLine(1, 2, j)))
			j++;
		if (j > n) {
			Answer(1, 2, i, i + 1);
			return 0;
		}
		if (isOnLine(1, 2, i))
			i++;
		if (j < n && isOnLine(1, 2, j))
			j++;
		Answer(1, 2, i, j);
		return 0;
	}
	int i_ = 0, j_ = 0;
	for (int i = 1; i <= 3; i++)
		for (int j = i + 1; j <= 3; j++)
			if (isOnLine(i, j, 4)) {
				i_ = i, j_ = j;
				goto out;
			}
out:
	if (!i_)
		for (int i = 1; i <= 4; i++)
			for (int j = i + 1; j <= 4; j++)
				if (isOnLine(i, j, 5)) {
					int k = 1;
					while (k == i || k == j)
						k++;
					int l = k + 1;
					while (l == i || l == j)
						l++;
					Answer(i, j, k, l);
					return 0;
				}
	int i = 5;
	while (i + 1 < n && isOnLine(i_, i, i + 1))
		i++;
	if (i < n && isOnLine(i_, j_, i))
		i++;
	Answer(i_, j_, i_ ^ j_, i);
	return 0;
}

Compilation message (stderr)

office.c: In function 'int isOnLine(int, int, int)':
office.c:85:13: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   85 |     _Fin(0, "Protocol error");
      |             ^~~~~~~~~~~~~~~~
office.c:88:13: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   88 |     _Fin(0, "Protocol error");
      |             ^~~~~~~~~~~~~~~~
office.c:92:17: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   92 |     _Fin(false, "Too many questions");
      |                 ^~~~~~~~~~~~~~~~~~~~
office.c: In function 'void Answer(int, int, int, int)':
office.c:123:13: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  123 |     _Fin(0, "Protocol error");
      |             ^~~~~~~~~~~~~~~~
office.c:130:21: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  130 |          _Fin(true, "Correct");
      |                     ^~~~~~~~~
office.c:132:22: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  132 |          _Fin(false, "Wrong answer");
      |                      ^~~~~~~~~~~~~~
office.c:136:21: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  136 |          _Fin(true, "Correct");
      |                     ^~~~~~~~~
office.c:138:22: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  138 |          _Fin(false, "Wrong answer");
      |                      ^~~~~~~~~~~~~~
office.c:140:19: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  140 |       _Fin(false, "Wrong answer");
      |                   ^~~~~~~~~~~~~~
office.c:142:14: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
  142 |   _Fin(true, "Correct");
      |              ^~~~~~~~~
office.c: In function 'void _doInit()':
office.c:33:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     scanf("%d", &_N);
      |     ~~~~~^~~~~~~~~~~

• Subtask 1: 100 / 100